Long before winter seals the forest under ice, certain frogs begin preparing for a transformation that defies basic biology.

The animal kingdom is full of fascinating tricks for enduring sub-freezing temperatures. Birds, for example, often just take ...

On a winter walk through Alaska’s forests, you might step over what looks like a dead frog, locked stiff beneath the leaves. Its eyes are glazed with ice, its heart doesn’t beat, and its lungs do ...

Rana sylvatica in eastern Tennessee breeds at temperatures similar to those reported for this species in other parts of North America. Development of eggs and tadpoles in Tennessee occurred at lower ...

Wood frogs (Rana sylvatica) exhibit an extraordinary capacity for freeze tolerance, an adaptation that enables survival despite the conversion of up to 65–70% of their total body water into ...

Nearly half of the amphibian species in northeastern North America rely on vernal pools as their primary breeding habitat. The problem is that, because vernal pools are small and isolated, they are ...

One of my favorite rituals of spring is to visit vernal pools (temporary seasonal ponds that dry out by the end of summer) to look for wood frog and spotted salamander eggs. There is something ...

As I wandered around a beaver pond one day in mid-September, I noticed something small and dark moving slowly through the grass and weeds. It was a toadlet, just recently transformed from a tadpole.

Loud sounds matter in both car design and frog flirting. So New Hampshire biologists lugged an acoustic camera used by car designers to springtime frog-mating pools to explore female preferences. Now ...